Add VRChat and GitHub packages to Unity project

Assets/VRCSDK/Dependencies/VRChat/Scripts/Validation/Performance/MeshUtils.cs

@@ -0,0 +1,34 @@
+using System.Collections.Generic;
+using UnityEngine;
+
+namespace VRCSDK2.Validation.Performance
+{
+    public static class MeshUtils
+    {
+        private const uint INDICES_PER_TRIANGLE = 3U;
+
+        public static uint GetMeshTriangleCount(Mesh sourceMesh)
+        {
+            if(sourceMesh == null)
+            {
+                return 0;
+            }
+
+            // We can't use GetIndexCount if the mesh isn't readable so just return a huge number.
+            // The SDK Control Panel should show a warning in this case.
+            if(!sourceMesh.isReadable)
+            {
+                return uint.MaxValue;
+            }
+
+            uint count = 0;
+            for(int i = 0; i < sourceMesh.subMeshCount; i++)
+            {
+                uint indexCount = sourceMesh.GetIndexCount(i);
+                count += indexCount / INDICES_PER_TRIANGLE;
+            }
+
+            return count;
+        }
+    }
+}